I would just like to mention that Global Warming is the warming of the globe. Just because the atmosphere doesn't feel different (i.e. eternal summer in am 4 seasons area), doesn't mean the ground we walk on isn't getting hotter over time. In fact, the earth is supposed to heat up over time as long as the sun exist. Therefore, Global warming is a natural occurance that would happen whether people lived on the Earth or not. The real arguement is, "Are humans making the natural process our planet under goes worse than it has to be?"
The answer to that question is "Yes, humans are making the natural increase in the temperature of the globe faster and more drastic than it should be." Most of the time I state things as my opinion. But humans as a species have to face facts. Since the dawn of human civilization humans as a species have:
Hunted many animals into or near extinction (and continue to do so even with laws in place to stop them)
Damged animal habbits to the point that some species of plant and animal died before we even knew they existed (which, again, involves ignoring laws that tell them not to)
Torn the planet apart on the inside drilling for oil, mining for ores and stones (Then spilling said oil)
Ravaged the surface of the Earth with strip mining, deforestation, and pollution (Look outside your nearest window for a piece of liter)
Contaminated the air around us with exhuast from factories, businesses, homes, and transportation (NY has the asthma rates to prove this one. Seriously, we're keeping score
Created islands of litter in oceans (We even named it T_T
Polluted the water and land with hazardous and non hazardous waste (Love Canal
Set off nuclear bombs on the surface of the Earth (Do I really need a reference? -_-)
And this is simply a partial list I can think of off the top of my head.
Anyone who doesn't believe in Global Warming is in deniel. You can't abuse a planet the way humans have without terrible consequences. V_V